53731723681 has 2 divisors, whose sum is σ = 53731723682. Its totient is φ = 53731723680.

The previous prime is 53731723651. The next prime is 53731723807. The reversal of 53731723681 is 18632713735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29398531600 + 24333192081 = 171460^2 + 155991^2 .

It is a cyclic number.

It is not a de Polignac number, because 53731723681 - 2²⁵ = 53698169249 is a prime.

It is a super-2 number, since 2×53731723681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53731723601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26865861840 + 26865861841.

It is an arithmetic number, because the mean of its divisors is an integer number (26865861841).

Almost surely, 2^53731723681 is an apocalyptic number.

It is an amenable number.

53731723681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53731723681 is an equidigital number, since it uses as much as digits as its factorization.

53731723681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The spelling of 53731723681 in words is "fifty-three billion, seven hundred thirty-one million, seven hundred twenty-three thousand, six hundred eighty-one".